Multi-frequency antenna and electronic device having the multi-frequency antenna

Inactive Publication Date: 2010-02-11
WISTRON NEWEB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]A main objective of the present invention is to provide a multi-frequency antenna hav

Problems solved by technology

Therefore, a traditional antenna cannot be disposed in the structural space of the notebook computers.
However, these two bandwidths of the antenna do not satisfy current needs.
Therefore, the antenna 90 does not meet current bandwidth requirements of the WWAN antenna or other broadband antennas.

Method used

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  • Multi-frequency antenna and electronic device having the multi-frequency antenna
  • Multi-frequency antenna and electronic device having the multi-frequency antenna
  • Multi-frequency antenna and electronic device having the multi-frequency antenna

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0040]In the invention, the multi-frequency antenna 10a is a 3-D structure. The multi-frequency antenna 10a comprises a radiating element 21, a grounding element 22, a connecting element 23, a tuning bar 31, and a feeding point F. The radiating element 21 is composed of a metal. When current is fed into the radiating element 21, the radiating element 21 emits radiation energy. The radiating element 21 comprises a first radiation area 211, a second radiation area 212, a third radiation area 213, and a fourth radiation area 214. The first radiation area 211 is connected to the second radiation area 212. The third radiation area 213 is connected to the second radiation area 212 and the fourth radiation area 214. There are bends between the third radiation area 213 and the second radiation area 212, and between the third radiation area 213 and the fourth radiation area 214. The third radiation area 213, the second radiation area 212, and the fourth radiation area 214 are perpendicularly...

second embodiment

[0050]In the invention, the distance from the connected position between the tuning bar 31 of the multi-frequency antenna 10b and the fourth radiation area 214 to the side of the radiating element 21 is a specific distance td. As shown in FIG. 4B, when distance td is 0 mm, 2 mm, or 4 mm, the multi-frequency antenna 10b has different operating bands. Therefore, the operating band of the multi-frequency antenna 10b can be adjusted by changing the position of the tuning bar 31.

[0051]The connected position between the tuning bar 31 and the radiating element 21 of the invention is not limited to the first and second embodiments. Please refer to FIG. 5A and FIG. 5B. FIG. 5A is a perspective drawing of a multi-frequency antenna of a third embodiment according to the invention. FIG. 5B shows the VSWR at different frequencies of the third embodiment according to the invention shown in FIG. 5A.

third embodiment

[0052]In the invention, the tuning bar 31a of the multi-frequency antenna 10c is disposed between the second radiation area 212 and the fourth radiation area 214 and connected to the third radiation area 213. As shown in FIG. 5B, the multi-frequency antenna 10c is capable of resonating a frequency band of about 1500 MHz.

[0053]Please refer to FIG. 6A and FIG. 6B. FIG. 6A is a perspective drawing of a multi-frequency antenna of a fourth embodiment according to the invention. FIG. 6B shows the VSWR at different frequencies of the fourth embodiment according to the invention shown in FIG. 6A.

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Abstract

A multi-frequency antenna for wireless signal transmission of an electronic device is disclosed. The multi-frequency antenna has a radiating element, a grounding element, a feeding point, and a tuning bar. The radiating element comprises a first radiation area, a second radiation area, a third radiation area, and a fourth radiation area, wherein the third radiation area is perpendicularly connected to the second radiation area and the fourth radiation area substantially. The grounding element is used for grounding the multi-frequency antenna. The feeding point is disposed on the radiation area to feed an electric signal. The tuning bar is connected to the radiating element to adjust an operating band of the multi-frequency antenna.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a multi-frequency antenna and, more particularly, to a multi-frequency antenna having a small volume and having a multi-frequency operating band controlled with a tuning bar.[0003]2. Description of the Related Art[0004]With developments in wireless communications technologies, many electronic devices in the market, such as notebook computers, have become lighter and smaller. In particular, users require not only the functionalities of the notebook computers; they also require the notebook computers to be lightweight and slim. Therefore, a traditional antenna cannot be disposed in the structural space of the notebook computers.[0005]However, in wireless communications, the Wireless Wide Area Network (WWAN) antenna is a very popular and significant transmission device. In prior art technologies, the working frequency ranges of a WWAN antenna are usually 824˜960 MHz and 1710˜2170 MHz. Howev...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/24H01Q5/15
CPCH01Q1/38H01Q5/00H01Q5/371H01Q9/0471H01Q9/0442
InventorCHANG, CHENG-WEICHANG, WEI-SHAN
OwnerWISTRON NEWEB